sympy prints some expressions putting the negative term first.

Sensy打印了一些表达式，将否定项放在第一位。

example:

示例：

from sympy import symbols, Matrix
import numpy as np
m = 3

obj = np.dtype(object)
ρ = np.asarray([symbols(f"ρ_{i}") for i in range(m)], obj)
ε = np.asarray([symbols(f"ε_{i}") for i in range(m)], obj)


expr = ε - ρ * ε[1]
    
Matrix(expr)

output:

输出：

Here, I want second and third elements to be printed as the first element (positive term comes first), is there a solution for that?

在这里，我希望打印第二个和第三个元素作为第一个元素(第一个元素是积极项)，有什么解决方案吗？

The best thing you can try is:

你可以尝试的最好办法是：

from sympy import *
import numpy as np
init_printing(order="none")

then:

然后：

m = 3
obj = np.dtype(object)
ρ = np.asarray([symbols(f"ρ_{i}") for i in range(m)], obj)
ε = np.asarray([symbols(f"ε_{i}") for i in range(m)], obj)
expr = ε - ρ * ε[1]
    
Matrix(expr)